It really depends.. everyones cars will respond differently to certain mods.... I made +22whp with Test pipes and Exhaust...
If you want to get the most and dont ever plan on FI, this is what I would do
Stillen G3 intakes
Fast Intentions Long Tube Headers
Either FI Exhaust or HKS Exhaust
A Grounding kit
Underdrive pullies
Uprev Tune
That will give you the most without building the motor or going FI.
DAN
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-My BRZ with exhaust will decimate all if we overnight parts from Japan-
10 Civic EX Sedan- Current Daily
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